First, identify some of the most important elements that compose Earth’s continental crust. Which two seem to be the most important and why?
Second, describe some of the physical properties that provide a reliable means to identify common minerals. Also, discuss how certain properties can exhibit a range of characteristics or values, thus making them less useful for identification purposes. And of all the properties discussed, which seem to be the least useful and why? Give at least two examples. 200-300 words required with APA.